Magen David vs Star of David

Magen David and Star of David both are nouns.

Word	Noun	Adjective	Verb	Adverb
Magen David	Yes	No	No	No
Star of David	Yes	No	No	No

As nouns, Magen David and Star of David are synonyms defined as:

Magen David and Star of David: a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism

Other synonyms of Magen David include Mogen David, Shield of David, Solomon's seal.

Magen David (noun)	Star of David (noun)
a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism	a six-pointed star formed from two equilateral triangles; an emblem symbolizing Judaism